\begin{tikzpicture}
	\tkzDefPoints{0/0/A, 3/0/B, 2/1.5/C}
	\tkzDrawPolygon(A,B,C)
	\tkzLabelPoints[left](A)
	\tkzLabelPoints[right](B)
	\tkzLabelPoints[above](C)
\end{tikzpicture}

